HA Goodman has got the score - Bernie is just playing everyone with this endorsement talk:
Within his speech pushing for unity with Clinton, Bernie Sanders stated I look forward to your votes during the roll call on Tuesday night. Therefore, theres perhaps a chance that he could still become Democratic nominee, although the WikiLeaks DNC emails have shown that the primary was rigged in favor of Clinton. Thus, Bernie Sanders supporters, and people who feel that theyve experienced a roller coaster of emotions have another option; a candidate who wasnt at risk of criminal indictments. Her name is Dr. Jill Stein of the Green Party, and shes not only a remarkable woman, Stein offers hope to millions of people who feel cheated by the system. I explain in this YouTube segment why Bernie Sanders might truly want you to vote for Dr. Stein in 2016.
Jill Stein is becoming the new Bernie Sanders (if indeed Bernie doesnt become Democratic nominee) according to an ABC News piece titled Green Partys Jill Stein Offers Hope for Bernie Sanders Supporters: